Volcanoes Haley willits


The Volcano, a primordial beast that roams our earth, striking us with its fiery wrath. A merciless beast wreaking havoc on our land, or so we have been told. A violent history of destructive eruptions has painted a dangersome picture inside our heads of these natural landforms, but have we been too quick to overlook the benefits they can provide us with?

This page is an outline of the many burdens and blessings that volcanoes have brought our planet, along with a detailed history of this phenomenal product of our earth's techtonic plates. This page will be organized in sections; A, B & C, each section outlining a different subtopic. So with out further or do, let's dive into the vast information associated with volcanoes.

Part A; Volcano Origins

A1: What Is a Volcano?

Before we further explore the details of this landform, we first have to find out what a volcano actually is. Scientifically, a volcano is a mountain or hill with an opening called a crater that connects to the magma chamber via a long vertical tunnel called the vent. Pressure from below the earth's surface pushes the magma out of the chamber and into the main vent as well as two small openings on the side of the volcano called secondary vents, therefore creating an eruption. Depending on the type of eruption and the type of volcano, the lava will disperse differently, sometimes flowing quickly, sometimes slowly, and even spurting out the top crater in what we know as a volcanic eruption.

A2: The Three Types of Volcanoes

Composite Volcanoes

Also known as Stratovolcanoes, Composite Volcanoes are usually tall, steep Volcanoes consisting of several layers of dried lava. They are quite steep because when they erupt, their lava contains a large amount of silica ( silicon dioxide) that causes the lava to have a very high viscosity. This means that the lava is extra thick cannot spread very far before it cools and creates another layer to the volcano. This can continue for as long as the volcano is still active and can reach highs of over 8,00 feet.

Cinder Cone Volcano

Cinder cone volcanoes are circular- based volcanoes that usually have a large crater surrounding the centre vent where lava exits the volcano. Cinder cone volcanoes are also called scoria volcanoes because of what occurs during their eruption. When cinder cone volcanoes erupt, they spray small fragments of lava called scoria about 300-1200 feet in the air. The scoria has a very low density, causing it to land in loose clumps around the volcano. By the time the scoria falls, it has usually already cooled and therefore added to the volcanoe's mass. These volcanoes erupt for very short amounts of time, and only take a few years, if not months to form.

Shield Volcanoes

Shield volcanoes, unlike the other two types, are very flat and non-explosive volcanoes. This is because shield volcanoes are al

A3: How are Volcanoes formed?

Underneath earth's surface lies.

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